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粉煤灰空心微珠与可溶性Sr(II)的水热共处理——一种将Sr-90以类矿物形式固定的环境可持续方法

Hydrothermal Co-Processing of Coal Fly Ash Cenospheres and Soluble Sr(II) as Environmentally Sustainable Approach to Sr-90 Immobilization in a Mineral-like Form.

作者信息

Vereshchagina Tatiana, Kutikhina Ekaterina, Solovyov Leonid, Vereshchagin Sergei, Mazurova Elena, Anshits Alexander

机构信息

Federal Research Center "Krasnoyarsk Science Center of Siberian Branch of the Russian Academy of Sciences", Institute of Chemistry and Chemical Technology, 50/24 Akademgorodok, 660036 Krasnoyarsk, Russia.

Department of Chemistry, Siberian Federal University, Svobodny Av. 79, 660041 Krasnoyarsk, Russia.

出版信息

Materials (Basel). 2021 Sep 26;14(19):5586. doi: 10.3390/ma14195586.

DOI:10.3390/ma14195586
PMID:34639983
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8509784/
Abstract

Co-processing of radioactive effluents with coal fly ash-derived materials is recognized as a resource-saving approach for efficient stabilization/solidification of radioactive components of wastewater. In this context, the paper is focused on the hydrothermal synthesis of Sr-bearing aluminosilicate/silicate phases as analogs of a mineral-like Sr waste form using hollow glass-crystalline aluminosilicate microspheres from coal fly ash (cenospheres) as a glassy source of Si and Al (SiO-AlO)) and Sr(NO) solutions as Sr simulant wastewater. The direct conversion of cenosphere glass in the Sr(NO)-NaOH-HO-(SiO-AlO) system as well as Sr sorption on cenosphere-derived analcime (ANA) in the Sr(NO)-HO-ANA system were studied at 150-200 °C and autogenous pressure. The solid and liquid reaction products were characterized by SEM-EDS, PXRD, AAS and STA. In the Sr(NO)-NaOH-HO-(SiO-AlO) system, the hydrothermal processing at 150-200 °C removes 99.99% of the added Sr from the solution by forming Sr-tobermorite and Sr-plagioclase phases. In the Sr(NO)-HO-ANA system, Sr sorption on analcime results in the formation of solid solutions (NaSr)AlSiO·HO of the Na-analcime-Sr-wairakite series. The results can be considered as a basis for the development of environmentally sustainable technology for Sr removal from wastewater and immobilization in a mineral-like form by co-processing waste from coal-fired and nuclear power plants.

摘要

放射性废水与粉煤灰衍生材料的协同处理被认为是一种节约资源的方法，可有效稳定/固化废水中的放射性成分。在此背景下，本文重点研究了以粉煤灰空心玻璃晶质硅铝酸盐微球（漂珠）作为硅和铝（SiO-AlO）的玻璃质来源，以及以硝酸锶（Sr(NO)）溶液作为模拟含锶废水，水热合成含锶硅铝酸盐/硅酸盐相，作为类矿物锶废物形式的类似物。在150-200℃和自生压力下，研究了在Sr(NO)-NaOH-H₂O-(SiO-AlO)体系中漂珠玻璃的直接转化，以及在Sr(NO)-H₂O-钠沸石（ANA）体系中锶在漂珠衍生钠沸石上的吸附。通过扫描电子显微镜-能谱仪（SEM-EDS）、粉末X射线衍射仪（PXRD）、原子吸收光谱仪（AAS）和热重分析仪（STA）对固液反应产物进行了表征。在Sr(NO)-NaOH-H₂O-(SiO-AlO)体系中，150-200℃的水热处理通过形成锶雪硅钙石和锶斜长石相，从溶液中去除了99.99%添加的锶。在Sr(NO)-H₂O-ANA体系中，锶在钠沸石上的吸附导致形成了钠沸石-锶歪碱沸石系列的固溶体（NaₓSr₁₋ₓ）AlSi₃O₈·H₂O。这些结果可被视为开发环境可持续技术的基础，该技术通过协同处理燃煤电厂和核电站的废物，从废水中去除锶并以类矿物形式固定。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6f6b/8509784/5c718bd7b32d/materials-14-05586-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6f6b/8509784/5e6f0904a01e/materials-14-05586-g001.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6f6b/8509784/20d8039cec06/materials-14-05586-g003.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6f6b/8509784/a2aa21823673/materials-14-05586-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6f6b/8509784/e3c57adce64d/materials-14-05586-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6f6b/8509784/ddb945ef0c89/materials-14-05586-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6f6b/8509784/5c718bd7b32d/materials-14-05586-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6f6b/8509784/5e6f0904a01e/materials-14-05586-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6f6b/8509784/cb1c2928feea/materials-14-05586-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6f6b/8509784/20d8039cec06/materials-14-05586-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6f6b/8509784/f13ae04da846/materials-14-05586-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6f6b/8509784/a2aa21823673/materials-14-05586-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6f6b/8509784/e3c57adce64d/materials-14-05586-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6f6b/8509784/ddb945ef0c89/materials-14-05586-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6f6b/8509784/5c718bd7b32d/materials-14-05586-g008.jpg

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[Zeolite Produced from Fly Ash by Thermal Treatment in Alkaline Solution and Its Capability to Adsorb Cs(I) and Sr(II) in Aqueous Solution].[通过在碱性溶液中热处理粉煤灰制备的沸石及其在水溶液中吸附铯（I）和锶（II）的能力]
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Power production waste.能源生产废料。
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